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The direct current (DC) power P (W) is determined by multiplying the applied voltage (U) by the current I (A), as shown above. In the example below, the amount of electrical energy determined by the previous equation is retrieved from the power supply and
Direct Current (DC) Power. Direct current, or DC, refers to power systems that use one polarity of voltage and current, however amplitude may vary (cyclic or random). Figure 2 - Basic circuit showing voltage and current with a DC voltage source. Ohm’s Law.
Lastly, there is a practical part showing step-by-step how to measure DC power, single phase, 2-phase, 3-phase in star, delta, Aron and V-connection AC power, as well as what is to consider when measuring inverters and an example of how to calculate the power of a 6-phase motor.
DC power measurement is relatively simple as the equation is simply watts = volts x amps. For AC power measurement, the power factor (PF) introduces complexity as watts = volts x amps x PF. This measurement of AC power is referred to as active power, true power or real power.
How to properly use a Digital Oscilloscope to make Electrical Power Measurements. Some “Do’s” and “Don’ts”. Measurement Examples. Comparison of a DSO and a Power Analyzer. Answer your questions concerning Electrical Power Measurements.
Calibrated Traceable Measurement System Direct Connections to High Voltage & High Current Typical 16-bit 65,636 levels. Power approx at 3.5% Based on Probe Accuracy Probes for high frequency & small currents Typical 8-bit 256 levels.
DC Electric Power (at Static Condition) At the case of actual DC driven equipment, input level of both DC voltage and DC current is not stable. Therefore, power measuring instrument is required to measure not only DC signal but AC input (transient signal). AC power at the condition of sine wave.
